<template>
    <div style="position: relative;">
        <div v-if="type === '2'" class="verify-img-out"
             :style="{height: (parseInt(setSize.imgHeight) + vSpace) + 'px'}"
            >
            <div class="verify-img-panel" :style="{width: setSize.imgWidth,
                                                   height: setSize.imgHeight,}">
                <img :src="'data:image/png;base64,'+backImgBase" alt="" style="width:100%;height:100%;display:block">
                <div class="verify-refresh" @click="refresh" v-show="showRefresh"><i class="iconfont icon-refresh"></i>
                </div>
                <transition name="tips">
                    <span class="verify-tips" v-if="tipWords" :class="passFlag ?'suc-bg':'err-bg'">{{tipWords}}</span>
                </transition>
            </div>
        </div>
        <!-- 公共部分 -->
        <div class="verify-bar-area" :style="{width: setSize.imgWidth,
                                              height: barSize.height,
                                              'line-height':barSize.height}">
            <span class="verify-msg" v-text="text"></span>
            <div class="verify-left-bar"
                 :style="{width: (leftBarWidth!==undefined)?leftBarWidth: barSize.height, height: barSize.height, 'border-color': leftBarBorderColor, transaction: transitionWidth}">
                <span class="verify-msg" v-text="finishText"></span>
                <div class="verify-move-block"
                     @touchstart="start"
                     @mousedown="start"
                     :style="{width: barSize.height, height: barSize.height, 'background-color': moveBlockBackgroundColor, left: moveBlockLeft, transition: transitionLeft}">
                    <i :class="['verify-icon iconfont', iconClass]"
                       :style="{color: iconColor}"></i>
                    <div v-if="type === '2'" class="verify-sub-block"
                        :style="{'width':Math.floor(parseInt(setSize.imgWidth)*47/310)+ 'px',
                                  'height': setSize.imgHeight,
                                  'top':'-' + (parseInt(setSize.imgHeight) + vSpace) + 'px',
                                  'background-size': setSize.imgWidth + ' ' + setSize.imgHeight,
                                  }">
                        <img :src="'data:image/png;base64,'+blockBackImgBase" alt=""  style="width:100%;height:100%;display:block;-webkit-user-drag:none;">
                    </div>
                </div>
            </div>
        </div>
    </div>
</template>
<script type="text/babel">
/**
 * VerifySlide
 * @description 滑块
 * */
import { aesEncrypt } from './../utils/ase'
import { resetSize } from './../utils/util'
import { reqGet, reqCheck } from './../api/index'
import { computed, onMounted, reactive, ref, watch, nextTick, toRefs, getCurrentInstance } from 'vue'
//  "captchaType":"blockPuzzle",
export default {
    name: 'VerifySlide',
    props: {
        captchaType: {
            type: String
        },
        type: {
            type: String,
            default: '1'
        },
        // 弹出式pop，固定fixed
        mode: {
            type: String,
            default: 'fixed'
        },
        vSpace: {
            type: Number,
            default: 5
        },
        explain: {
            type: String,
            default: '向右滑动完成验证'
        },
        imgSize: {
            type: Object,
            default () {
                return {
                    width: '310px',
                    height: '155px'
                }
            }
        },
        blockSize: {
            type: Object,
            default () {
                return {
                    width: '50px',
                    height: '50px'
                }
            }
        },
        barSize: {
            type: Object,
            default () {
                return {
                    width: '310px',
                    height: '40px'
                }
            }
        }
    },
    setup (props, context) {
        const { mode, captchaType, vSpace, imgSize, barSize, type, blockSize, explain } = toRefs(props)
        const { proxy } = getCurrentInstance()
        let secretKey = ref(''), // 后端返回的ase加密秘钥
            passFlag = ref(''), // 是否通过的标识
            backImgBase = ref(''), // 验证码背景图片
            blockBackImgBase = ref(''), // 验证滑块的背景图片
            backToken = ref(''), // 后端返回的唯一token值
            startMoveTime = ref(''), // 移动开始的时间
            endMovetime = ref(''), // 移动结束的时间
            tipsBackColor = ref(''), // 提示词的背景颜色
            tipWords = ref(''),
            text = ref(''),
            finishText = ref(''),
            setSize = reactive({
                imgHeight: 0,
                imgWidth: 0,
                barHeight: 0,
                barWidth: 0
            }),
            top = ref(0),
            left = ref(0),
            moveBlockLeft = ref(undefined),
            leftBarWidth = ref(undefined),
            // 移动中样式
            moveBlockBackgroundColor = ref(undefined),
            leftBarBorderColor = ref('#ddd'),
            iconColor = ref(undefined),
            iconClass = ref('icon-right'),
            status = ref(false), // 鼠标状态
            isEnd = ref(false) ,		// 是够验证完成
            showRefresh = ref(true),
            transitionLeft = ref(''),
            transitionWidth = ref(''),
            startLeft = ref(0) 

        const barArea = computed(()=>{
            return proxy.$el.querySelector('.verify-bar-area')
        })
        function init() {
            text.value = explain.value
            getPictrue()
            nextTick(() => {
                let {imgHeight,imgWidth,barHeight,barWidth} = resetSize(proxy)
                setSize.imgHeight = imgHeight
                setSize.imgWidth = imgWidth
                setSize.barHeight = barHeight
                setSize.barWidth = barWidth
                proxy.$parent.$emit('ready', proxy)
            })

            window.removeEventListener('touchmove', function (e) {
                move(e)
            })
            window.removeEventListener('mousemove', function (e) {
                move(e)
            })

            // 鼠标松开
            window.removeEventListener('touchend', function () {
                end()
            })
            window.removeEventListener('mouseup', function () {
                end()
            })

            window.addEventListener('touchmove', function (e) {
                move(e)
            })
            window.addEventListener('mousemove', function (e) {
                move(e)
            })

            // 鼠标松开
            window.addEventListener('touchend', function () {
                end()
            })
            window.addEventListener('mouseup', function () {
                end()
            })
        }
        watch(type, () => {
            init()
        })
        onMounted(() => {
            // 禁止拖拽
            init()
            proxy.$el.onselectstart = function () {
                return false
            }
        })
        // 鼠标按下
        function start(e) {
            e = e || window.event
            if (!e.touches) { // 兼容PC端 
                var x = e.clientX
            } else { // 兼容移动端
                var x = e.touches[0].pageX
            }
            startLeft.value =Math.floor(x - barArea.value.getBoundingClientRect().left)
            startMoveTime.value = +new Date() // 开始滑动的时间
            if (isEnd.value == false) {
                text.value = ''
                moveBlockBackgroundColor.value = '#337ab7'
                leftBarBorderColor.value = '#337AB7'
                iconColor.value = '#fff'
                e.stopPropagation()
                status.value = true
            }
        }
        // 鼠标移动
        function move(e) {
            e = e || window.event
            if (status.value && isEnd.value == false) {
                if (!e.touches) { // 兼容PC端
                    var x = e.clientX
                } else { // 兼容移动端
                    var x = e.touches[0].pageX
                }
                var bar_area_left = barArea.value.getBoundingClientRect().left
                var move_block_left = x - bar_area_left // 小方块相对于父元素的left值
                if (move_block_left >= barArea.value.offsetWidth - parseInt(parseInt(blockSize.value.width) / 2) - 2) {
                    move_block_left = barArea.value.offsetWidth - parseInt(parseInt(blockSize.value.width) / 2) - 2
                }
                if (move_block_left <= 0) {
                    move_block_left = parseInt(parseInt(blockSize.value.width) / 2)
                }
                // 拖动后小方块的left值
                moveBlockLeft.value = (move_block_left - startLeft.value) + 'px'
                leftBarWidth.value = (move_block_left - startLeft.value) + 'px'
            }
        }

        // 鼠标松开
        function end() {
            endMovetime.value = +new Date()
            // 判断是否重合
            if (status.value && isEnd.value == false) {
                var moveLeftDistance = parseInt((moveBlockLeft.value || '').replace('px', ''))
                moveLeftDistance = moveLeftDistance * 310 / parseInt(setSize.imgWidth)
                const data = {
                    captchaType: captchaType.value,
                    'captcha_code':secretKey.value ? aesEncrypt(JSON.stringify({ x: moveLeftDistance, y: 5.0}), secretKey.value):JSON.stringify({x:moveLeftDistance,y:5.0}),
                    'captcha_key':backToken.value
                }
                reqCheck(data).then(res => {
                    if (res.code == 1) {
                        moveBlockBackgroundColor.value = '#5cb85c'
                        leftBarBorderColor.value = '#5cb85c'
                        iconColor.value = '#fff'
                        iconClass.value = 'icon-check'
                        showRefresh.value = false
                        isEnd.value = true
                        if (mode.value == 'pop') {
                            setTimeout(() => {
                                proxy.$parent.clickShow = false
                                refresh()
                            }, 1500)
                        }
                        passFlag.value = true
                        tipWords.value = `${((endMovetime.value - startMoveTime.value) / 1000).toFixed(2)}s验证成功`
                        var captchaVerification = secretKey.value ? aesEncrypt(backToken.value + '---' + JSON.stringify({ x: moveLeftDistance, y: 5.0 }), secretKey.value) : backToken.value + '---' + JSON.stringify({ x: moveLeftDistance, y: 5.0 })
                        setTimeout(() => {
                            tipWords.value = ''
                            proxy.$parent.closeBox()
                            proxy.$parent.$emit('success', { captchaVerification })
                        }, 1000)
                    } else {
                        moveBlockBackgroundColor.value = '#d9534f'
                        leftBarBorderColor.value = '#d9534f'
                        iconColor.value = '#fff'
                        iconClass.value = 'icon-close'
                        passFlag.value = false
                        setTimeout(function () {
                            refresh()
                        }, 1000)
                        proxy.$parent.$emit('error', proxy)
                        tipWords.value = '验证失败'
                        setTimeout(() => {
                            tipWords.value = ''
                        }, 1000)
                    }
                })
                status.value = false
            }
        }

        const refresh = () => {
            showRefresh.value = true
            finishText.value = ''

            transitionLeft.value = 'left .3s'
            moveBlockLeft.value = 0

            leftBarWidth.value = undefined
            transitionWidth.value = 'width .3s'

            leftBarBorderColor.value = '#ddd'
            moveBlockBackgroundColor.value = '#fff'
            iconColor.value = '#000'
            iconClass.value = 'icon-right'
            isEnd.value = false

            getPictrue()
            setTimeout(() => {
                transitionWidth.value = ''
                transitionLeft.value = ''
                text.value = explain.value
            }, 300)
        }

        // 请求背景图片和验证图片
        function getPictrue() {
            const data = {
                captchaType: captchaType.value
            }
            reqGet(data).then(res => {
                if (res.code == 1) {
                    backImgBase.value = res.data.originalImageBase64
                    blockBackImgBase.value = res.data.jigsawImageBase64
                    backToken.value = res.data.token
                    secretKey.value = res.data.secretKey
                } else {
                    tipWords.value = res.msg
                }
            })
        }
        return {
            secretKey, // 后端返回的ase加密秘钥
            passFlag, // 是否通过的标识
            backImgBase, // 验证码背景图片
            blockBackImgBase, // 验证滑块的背景图片
            backToken, // 后端返回的唯一token值
            startMoveTime, // 移动开始的时间
            endMovetime, // 移动结束的时间
            tipsBackColor, // 提示词的背景颜色
            tipWords,
            text,
            finishText,
            setSize,
            top,
            left,
            moveBlockLeft,
            leftBarWidth,
            // 移动中样式
            moveBlockBackgroundColor,
            leftBarBorderColor,
            iconColor,
            iconClass,
            status, // 鼠标状态
            isEnd,		// 是够验证完成
            showRefresh,
            transitionLeft,
            transitionWidth,
            barArea,
            refresh,
            start
        }
    }
}
</script>
